Provide an alternative for the option menu based business

utility functions. GtkOptionMenu is deprecated.

The original functions remain available for now as they are still in
use.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@21491 57a11ea4-9604-0410-9ed3-97b8803252fd

src/business/business-gnome/business-gnome-utils.c

@@ -654,3 +654,185 @@ gnc_ui_taxincluded_optionmenu (GtkWidget *omenu, GncTaxIncluded *choice)
     gtk_option_menu_set_history (GTK_OPTION_MENU (omenu), current);
     gtk_widget_show (menu);
 }
+
+/***********************************************************************
+ * gnc_simple_combo implementation functions
+ */
+
+typedef struct
+{
+    gint         component_id;
+    GtkComboBox  *cbox;
+    QofBook      *book;
+    gboolean     none_ok;
+    const char * (*get_name)(gpointer);
+    GList *      (*get_list)(QofBook*);
+
+} ListStoreData;
+
+static void
+gnc_simple_combo_add_item (GtkListStore *liststore, const char *label, gpointer this_item)
+{
+    GtkTreeIter iter;
+
+    gtk_list_store_append (liststore, &iter);
+    gtk_list_store_set (liststore, &iter, 0, label, 1, this_item, -1);
+}
+
+static void
+gnc_simple_combo_generate_liststore (ListStoreData *lsd)
+{
+    GList *items;
+    GtkListStore *liststore;
+
+    if (!(lsd->get_list))
+        return;
+    if (!(lsd->get_name))
+        return;
+
+    /* Get the list of items */
+    items = (lsd->get_list)(lsd->book);
+
+    /* Reset the combobox' liststore */
+    liststore = GTK_LIST_STORE (gtk_combo_box_get_model (lsd->cbox));
+    gtk_list_store_clear (liststore);
+
+    if (lsd->none_ok || !items)
+        gnc_simple_combo_add_item (liststore, _("None"), NULL);
+
+    for ( ; items; items = items->next)
+        gnc_simple_combo_add_item (liststore, (lsd->get_name)(items->data), items->data);
+}
+
+static void
+gnc_simple_combo_refresh_handler (GHashTable *changes, gpointer user_data)
+{
+    ListStoreData *lsd = user_data;
+    gnc_simple_combo_generate_liststore (lsd);
+}
+
+static void
+gnc_simple_combo_destroy_cb (GtkWidget *widget, gpointer data)
+{
+    ListStoreData *lsd = data;
+
+    gnc_unregister_gui_component (lsd->component_id);
+    g_free (lsd);
+}
+
+static ListStoreData *
+gnc_simple_combo_make (GtkComboBox *cbox, QofBook *book,
+                       gboolean none_ok, QofIdType type_name,
+                       GList * (*get_list)(QofBook*),
+                       GenericLookup_t get_name,
+                       gpointer initial_choice)
+{
+    ListStoreData *lsd;
+
+    lsd = g_object_get_data (G_OBJECT (cbox), "liststore-data");
+
+    /* If this is the first time we've been called, then build the
+     * Option Menu Data object, register with the component manager, and
+     * watch for changed items.  Then register for deletion, so we can
+     * unregister and free the data when this menu is destroyed.
+     */
+    if (!lsd)
+    {
+
+        lsd = g_new0 (ListStoreData, 1);
+        lsd->cbox = cbox;
+        lsd->book = book;
+        lsd->none_ok = none_ok;
+        lsd->get_name = get_name;
+        lsd->get_list = get_list;
+        g_object_set_data (G_OBJECT (cbox), "liststore-data", lsd);
+
+        lsd->component_id =
+            gnc_register_gui_component ("gnc-simple-combo-refresh-hook",
+                                        gnc_simple_combo_refresh_handler,
+                                        NULL, lsd);
+
+        if (type_name)
+            gnc_gui_component_watch_entity_type (lsd->component_id,
+                                                 type_name,
+                                                 QOF_EVENT_MODIFY | QOF_EVENT_DESTROY);
+
+        g_signal_connect (G_OBJECT (cbox), "destroy",
+                          G_CALLBACK (gnc_simple_combo_destroy_cb), lsd);
+    }
+
+    gnc_simple_combo_generate_liststore (lsd);
+    gnc_simple_combo_set_value (cbox, initial_choice);
+
+    return lsd;
+}
+
+/***********************************************************
+ * Specific invocations of the gnc_simple_combo widget
+ */
+
+/* Use a list available billing terms to fill the model of
+ * the combobox passed in.  If none_ok is true, then add "none" as a
+ * choice (with data set to NULL)..  If inital_choice is non-NULL,
+ * then that will be the default option setting when the menu is
+ * created.
+ */
+void
+gnc_billterms_combo (GtkComboBox *cbox, QofBook *book,
+                     gboolean none_ok, GncBillTerm *initial_choice)
+{
+    if (!cbox || !book) return;
+
+    gnc_simple_combo_make (cbox, book, none_ok, GNC_BILLTERM_MODULE_NAME,
+                           gncBillTermGetTerms,
+                           (GenericLookup_t)gncBillTermGetName,
+                           (gpointer)initial_choice);
+}
+
+/* Convenience functions for the above simple combo box types.  */
+
+/** Get the value of the item that is currently selected in the combo box */
+gpointer
+gnc_simple_combo_get_value (GtkComboBox *cbox)
+{
+    GtkTreeIter iter;
+    GtkTreeModel *model;
+    GValue value = { 0 };
+
+    if (!cbox) return NULL;
+
+    model = gtk_combo_box_get_model (cbox);
+    if (!gtk_combo_box_get_active_iter (cbox, &iter))
+        return NULL;
+    gtk_tree_model_get_value (model, &iter, 1, &value);
+    return g_value_get_pointer (&value);
+}
+
+/** Find the item in the combo box whose value is "data"
+ *  and make it the active item. */
+void
+gnc_simple_combo_set_value (GtkComboBox *cbox, gpointer data)
+{
+    GtkTreeIter iter;
+    GtkTreeModel *model;
+    gboolean valid_iter;
+
+    if (!cbox) return;
+
+    model = gtk_combo_box_get_model (cbox);
+    valid_iter = gtk_tree_model_get_iter_first (model, &iter);
+
+    while (valid_iter)
+    {
+        GValue value = { 0 };
+
+        gtk_tree_model_get_value (model, &iter, 1, &value);
+        if (g_value_get_pointer(&value) == data)
+        {
+            gtk_combo_box_set_active_iter (cbox, &iter);
+            return;
+        }
+
+        valid_iter = gtk_tree_model_iter_next (model, &iter);
+    }
+}

src/business/business-gnome/business-gnome-utils.h

@@ -95,5 +95,41 @@ void gnc_ui_optionmenu_set_changed_callback (GtkWidget *omenu,
 gpointer gnc_ui_optionmenu_get_value (GtkWidget *omenu);
 void gnc_ui_optionmenu_set_value (GtkWidget *omenu, gpointer data);
 
+/* Create a combo box of available billing terms based on
+ * the combo box If none_ok is true, then add "none" as a
+ * choice (with data set to NULL).  If inital_choice is non-NULL,
+ * then that will be the default option setting when the menu is
+ * created.
+ *
+ * Note: if you are interested in the currently active combo box
+ * item, you can use the function gnc_simple_combo_get_value below.
+ * This can be used for example in a callback function that triggers
+ * on the combo box' "changed" signal"
+ */
+void gnc_billterms_combo (GtkComboBox *cbox, QofBook *book,
+                          gboolean none_ok, GncBillTerm *initial_choice);
+
+/* Same thing except for the tax tables */
+//void
+//gnc_ui_taxtables_optionmenu (GtkComboBox *cbox, QofBook *book,
+//                             gboolean none_ok, GncTaxTable **choice);
+
+/* Build an option menu for choosing a GncTaxIncluded */
+//void gnc_ui_taxincluded_optionmenu (GtkComboBox *cbox, GncTaxIncluded *choice);
+
+
+/* Here are some "simple combo box" utilities that can be used with
+ * ANY of the above combo box types.  In particular the following
+ * functions are useful for hooking the above combo boxes into the
+ * GNC Option infrastructure.
+ */
+
+/** Get the value of the item that is currently selected in the combo box */
+gpointer gnc_simple_combo_get_value (GtkComboBox *cbox);
+
+/** Find the item in the combo box whose value is "data"
+ *  and make it the active item. */
+void gnc_simple_combo_set_value (GtkComboBox *cbox, gpointer data);
+
 
 #endif /* GNC_BUSINESS_GNOME_UTILS_H_ */